problem with dropdownlist

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ASP.NET

MVC

DropDownList

i want to show selected value in dropdownlist which is in database.but it shows all value and shows default value selected. my code is as follow:

  @Html.LabelFor(u => u.description, new {@class = "col-sm-3 control-label no-padding-right" })
   <div class="col-sm-6">
 <select  id="description" name="description" class="col-xs-10 col-sm-5" >
                                                                     
 @{
 List<string> hardwarenames = configuration_utility.DataLayer.Models.Machine.getAllhardware ();

 foreach (string description in hardwarenames)
 {
   <option value="@description">@description</option>
 }
}
</select>
                        
 </string></div>

i am using mvc with razor plz help me?